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- W2441940579 abstract "We have showed in a previous paper that the pulvinar extracellular unit activity in behaving monkeys was dependent on the attention the animal paid to the stimulus, or on its behavioral significance or on the intentional movements the animal performed. Several groups of pulvinar cells quantitatively studied in the behavioral tasks the monkeys performed were described. Projection and hand manipulation neurons belong to a group of pulvinar cells that increased their activity when the animal made an intentional movement of the limb towards an object that attracted his attention. Some of these cells showed temporal patterns of discharge as well as peak rates of activity that frequently differed for reaching movements to spatially separated targets. This suggested that the overall pattern of discharge of these population of cells differ for different directions of arm movements. We give here a description of the observations made in three behaving Macaca Nemestrina monkeys trained to project there hands and arms to four spatially separated targets situated on a panel in front of them and at arm's reach. The extracellular unit activity in the LP-pulvinar was simultaneously recorded during the execution of the behavioral task. Statistical analysis were applied to objectively quantify the electrophysiological data. In 39 microelectrode penetrations, 362 neurons were recorded. 50 cells, a 13 p. 100, showed significative changes in their discharge during the execution of the task. Neurons of this class were activated when the monkey made an intentional movement with his upper limb towards something that attracted his attention. They were driven very poorly, and in a not easily reproducible way by passive manipulation of the limb.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W2441940579 date "1986-01-01" @default.
- W2441940579 modified "2023-09-23" @default.
- W2441940579 title "Lateral-posterior (LP) and pulvinar unit activity related to intentional upper limb movements directed to spatially separated targets, in behaving Macaca nemestrina monkeys." @default.
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